Fluid-pressure motor



.(No Model.)

W. R. HARRIS.

FLUID PRESSUREMOTOE. V No. 376,821. Patented Jan 24,1888 FIGJ; I 77 i H V 1 11'? v |l l| @wwm UNITED STATES PATENT OFFICE. j

WILLIAM R. HARRIS, or GRERNVILLE, AssIcNoR To WILLIAM L. DEMING,

OF, SALEM, OHIO.

FLUID-PRESSURE MOTOR.

SPECIFICATION forming part of Letters Patent No. 376,821, dated January 24, 1888.

Application filed September 24,1887. Serial No. 250,553. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM B. HARRIS,

of Greenville, in the county of Darke and State of Ohio, have invented a certain new and useful Improvement in Fluid-Pressure Motors, of which improvement the following is a specification.

The object of my invention is to provide a s mple, compact, and inexpensive motor, speclally adapted to service as a pumping or blow ngengine, boiler-feeder, or other direct-act- 1ng, engine in the utilization of water, steam, compressed air, or other fluid under pressure as a motive power.

To this end my'invention, generally stated,

consists in the combination, with a cylinder having main induction andexhaust ports and supplemental valve-actuating ports, of a distribution-valve governing said ports and provided with supplemental ports, and, an auxillary valve governing the ports of the distribution-valve.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal central section through the cylinder and valve-chest of a motor embodying my invention; Fig, 2, a transverse section through the same at the line a: xof Fig. 1, and.

Fig. 3 a similar section at the line 3 y of Fig.1.

In the practiceof my invention the cylinder 1 is, as he'retofore,.fitted with a properlypacked piston, 2, secured upon a piston-rod, 3, to the outer end of which suitable connections can be madein accordance with the work to be performed, and is provided with induction and exhaust ports or passages 4, 4., and

5. A valve-chest, 6, is secured upon one side of the cylinder 1, inclos'ingavalve seat or face, 7, upon which a main or distribution valve,8,

which governs the admission and exhaust of.

motive fluid to and from the opposite sides of the piston 2, and is preferably of the piston or cylindrical type, is fitted to be reciprocated by the pressure of the motive fluid, as presently to be described. To effect such reciprocation of the main valve 8, and thereby to effeet the required alternately-oppositemove-.

ments of the working-piston 2 without the employment of external valve-gear, the cylinder and main valve are provided with a series of supplemental por ts,and an auxiliary valve is arranged to operate within the main valve, the construction and relationof these members being as follows: A port, 9, is formedin the cylinder, leading from the induction-passage 4 to a-point in the valve-face between the, opening of the opposite induction-passagai t, and the adjacent end of the valve-face 7, and

a similar port, 9 leads from the otherinduc- 61 tion-passage, 4, to a corresponding point on the valve-face betweenthe opening of the induction-passage 4 and the adjacentend. A port, 10, leads from the'cylinder, at such distance from one end thereof as to'be located'on 55 y the supplyside of the piston 2'when at that end of its stroke, to a point on the valve-face between the. opening of the port 9 'and the adjacent end of thevalveface, and a port,10

is similarly located relatively to the opposite 7o ends of the cylinder and valve-face. An auxiliary valve, 11, having a piston at each end and recessed or reducedbetween said pistons so as to communicate with "the fluid-supply pipe 17 of the'valvech'est, is fitted to recipro cate within the main distribution-valve 8, its

movement being limited by end stops,12,fixed therein, and the auxiliary valve 11 is further provided with a central exhaust cavity or recess, 14, which in the movements of the valve establishes communication between a central exhaust-passage, 15, extending through the- 7, to that on which the auxiliary valve'll' e moves, said ports being solocated that at one extremity of the stroke of the main valve. the port 13 communicates wit-h the cylinder-port 10 and the port 13 with the cylinder-port 9,.-

and at the other the port 13 communicates with 9 5 v the cylinder-port 9 and the cylinder-port 10.

Inoperation, and assuming'the working-pis ten 2 tobe moving in the direction indicated port 13 with the by the arrow, Fig. 1, motive fluid admitted to Ice the valve-chest through the supply-pipe 17 passes around the main valve'8 in a recess between the end pistons. thereof, and thence. through the induction-passage t to effect the stroke of the piston 2, the fluid which has performed the preceding stroke being exhausted through the passage 4 and exhaust passages 15 and 5 to the exhaust-pipe 18. As the piston 2 passes and uncovers the port motive fluid passes through the same and through the port 13, which in this position of the valves COlllmunicates therewith and moves the auxiliary valve 11 to the right, said valve being free to be moved, as its right-hand end is open to the exhaust through theport13,which communicates through the cylinder'port 9 and passage 4 with the exhaust-passage 5. This move I ment of the auxiliary piston establishes eonr munica-tion between the supply-pipe 17 and the passage 16 of the main valve and from the passage 16 of said valve to the exhaust-passages 15 and 5 and exhaust-pipe 18. Pressure being thereby exerted upon the outer end of the left-hand piston of the main valve 8, said valve is thereby thrown to the right and into position to admit motive fluid for the next stroke of the main piston to the right through the induction-passage t and to exhaust that which has performed the stroke just completed through the passages 4t, 15, and 5. The port 13" is by this movement of the main valve placed in communication with the port 10 and the port 13 with the port 9, so that when the port 10 is opened to the supply in the right-hand stroke of the piston the auxiliary valve 11 and main valve 8 are thrown to the left and restored to the position shown in the drawings to effect the next succeeding left-hand stroke of the main piston.

I claim as my invention and desire to secure by Letters Patent- 1. The combination of a cylinder, a main or distribution valve governing the supply and exhaust thereof, an auxiliary valve governing the supply and exhaust of motive fluid to and from the main valve, and a series of ports located,substantially as described, so as to alternately admit and exhaust motive fluid from the cylinder to and from opposite ends of the auxiliary valve, and thereby establish communication between opposite ends of the main valve and the supply and exhaust pipes alternately, substantially as set forth.

2. The combination of a cylinder provided with induction and exhaust passages, supplemental valve-supply ports leading from the cylinder to its valve face, and valve exhaustports leading from the induction-ports to the valve face, a main distribution-valve having pistons at its ends governing the supply and exhaust of the cylinder, said valve having a seat for an auxiliary valve, a central exhaustpassage, ports so located as to communicate alternately with the valve-supply and valveexhaust ports of the cylinder and ports leading from the auxiliary valve-seat to opposite cnds of the main valve, and an auxiliary valve fitting on the main valve and provided with a central exhaust-chamber governing communication between the exhanst-passage of the main valve and the ports leading to the ends thereof, substantially as set forth.

\VILLIA M R. HARRIS.

\Vitnesses:

CHAS. O. Lncxs, EDMUND GARRIGUES. 

